Nickjansen
Sorry for the late answer.
I really can not tell you what happens behind the scene if you are using MailStyler to create templates.
Campaign Manager has a field that holds the e-mail subject and a field that holds the body of an e-mail message:
![image https://i.imgur.com/ekGoF8X.png](https://i.imgur.com/ekGoF8X.png)
This field TEXT data type represents a text column with a maximum length of 65,535. You can change it via phpMyAdmin panel to a different type:
![image https://i.imgur.com/t6GXoh6.png](https://i.imgur.com/t6GXoh6.png)
Please note that I did not test the behavior of the module with a different field type.
TINYTEXT − This data type represents a text column with a maximum length of 255 (28 - 1) characters. In storage, each uses a one-byte length prefix indicating the byte quantity in the value.
TEXT − This data type represents a text column with a maximum length of 65,535 (216 - 1) characters. In storage, each uses a two-byte length prefix indicating the byte quantity in the value.
MEDIUMTEXT − This data type represents a text column with a maximum length of 16,777,215 (224 - 1) characters. In storage, each uses a three-byte length prefix indicating the byte quantity in the value.
LONGTEXT − This data type represents a text column with a maximum length of 4,294,967,295 or 4GB (232 - 1) characters. In storage, each uses a four-byte length prefix indicating the byte quantity in the value.
https://www.tutorialspoint.com/mariadb/mariadb_data_types.htm